mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-01-12 02:28:07 +02:00
a8ea3dbb46
* Replace use of old term label with attribute The specification has unified on the term attribute to describe key-value pairs. There exist still many hold-overs of the use of the term label. This updates those uses or deprecates exported types and functions in favor of renamed forms. * fix infinite recursion * Remove backticks from attribute set docs * Remove LabelFilterSelector entirely * Remove Metadata.Labels instead of deprecate * Update changelog with public changes * Revert OC err msg
133 lines
3.7 KiB
Go
133 lines
3.7 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"fmt"
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"log"
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"net/http"
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"sync"
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"time"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/exporters/prometheus"
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"go.opentelemetry.io/otel/metric/global"
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"go.opentelemetry.io/otel/metric/instrument"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/histogram"
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controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
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"go.opentelemetry.io/otel/sdk/metric/export/aggregation"
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processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
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selector "go.opentelemetry.io/otel/sdk/metric/selector/simple"
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)
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var (
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lemonsKey = attribute.Key("ex.com/lemons")
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)
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func initMeter() {
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config := prometheus.Config{
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DefaultHistogramBoundaries: []float64{1, 2, 5, 10, 20, 50},
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}
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c := controller.New(
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processor.NewFactory(
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selector.NewWithHistogramDistribution(
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histogram.WithExplicitBoundaries(config.DefaultHistogramBoundaries),
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),
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aggregation.CumulativeTemporalitySelector(),
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processor.WithMemory(true),
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),
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)
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exporter, err := prometheus.New(config, c)
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if err != nil {
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log.Panicf("failed to initialize prometheus exporter %v", err)
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}
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global.SetMeterProvider(exporter.MeterProvider())
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http.HandleFunc("/", exporter.ServeHTTP)
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go func() {
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_ = http.ListenAndServe(":2222", nil)
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}()
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fmt.Println("Prometheus server running on :2222")
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}
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func main() {
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initMeter()
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meter := global.Meter("ex.com/basic")
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observerLock := new(sync.RWMutex)
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observerValueToReport := new(float64)
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observerAttrsToReport := new([]attribute.KeyValue)
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gaugeObserver, err := meter.AsyncFloat64().Gauge("ex.com.one")
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if err != nil {
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log.Panicf("failed to initialize instrument: %v", err)
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}
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_ = meter.RegisterCallback([]instrument.Asynchronous{gaugeObserver}, func(ctx context.Context) {
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(*observerLock).RLock()
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value := *observerValueToReport
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attrs := *observerAttrsToReport
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(*observerLock).RUnlock()
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gaugeObserver.Observe(ctx, value, attrs...)
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})
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histogram, err := meter.SyncFloat64().Histogram("ex.com.two")
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if err != nil {
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log.Panicf("failed to initialize instrument: %v", err)
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}
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counter, err := meter.SyncFloat64().Counter("ex.com.three")
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if err != nil {
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log.Panicf("failed to initialize instrument: %v", err)
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}
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commonAttrs := []attribute.KeyValue{lemonsKey.Int(10), attribute.String("A", "1"), attribute.String("B", "2"), attribute.String("C", "3")}
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notSoCommonAttrs := []attribute.KeyValue{lemonsKey.Int(13)}
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ctx := context.Background()
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(*observerLock).Lock()
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*observerValueToReport = 1.0
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*observerAttrsToReport = commonAttrs
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(*observerLock).Unlock()
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histogram.Record(ctx, 2.0, commonAttrs...)
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counter.Add(ctx, 12.0, commonAttrs...)
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time.Sleep(5 * time.Second)
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(*observerLock).Lock()
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*observerValueToReport = 1.0
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*observerAttrsToReport = notSoCommonAttrs
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(*observerLock).Unlock()
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histogram.Record(ctx, 2.0, notSoCommonAttrs...)
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counter.Add(ctx, 22.0, notSoCommonAttrs...)
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time.Sleep(5 * time.Second)
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(*observerLock).Lock()
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*observerValueToReport = 13.0
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*observerAttrsToReport = commonAttrs
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(*observerLock).Unlock()
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histogram.Record(ctx, 12.0, commonAttrs...)
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counter.Add(ctx, 13.0, commonAttrs...)
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fmt.Println("Example finished updating, please visit :2222")
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select {}
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}
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